80821881

素因数分解:

$3^4\times 7^1\times {\mathrm{142543}}^1$

素因数の和:142562

約数の個数: 20

約数和(自身を含む): 137982592

約数和(自身を除く): 57160711

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 142543, 427629, 997801, 1282887, 2993403, 3848661, 8980209, 11545983, 26940627, 80821881]

約数ペア:

[(1, 80821881), (3, 26940627), (7, 11545983), (9, 8980209), (21, 3848661), (27, 2993403), (63, 1282887), (81, 997801), (189, 427629), (567, 142543)]